<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
<style type="text/css" style="display:none;"> P {margin-top:0;margin-bottom:0;} </style>
</head>
<body dir="ltr">
<div style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" class="elementToProof">
Hi Anselm and Bill,</div>
<div style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" class="elementToProof">
<br>
</div>
<div style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" class="elementToProof">
Yes, we have received the parts for the UV measurement tests.</div>
<div style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" class="elementToProof">
<br>
</div>
<div style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" class="elementToProof">
We have a UV lamp, UV rated optical fibers, a collimator, and optics for the "re-collector" for getting light back in to a fiber. I also got a small integrating sphere and UV rated photodiode. The remaining thing to figure out for the tests is how to hold the
optics in the correct orientation. I started looking into it and designed/3D-printed a prototype stand for the components, but haven't been able to test much beyond that.</div>
<div style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" class="elementToProof">
<br>
</div>
<div style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" class="elementToProof">
<span style="font-size:12pt" class="elementToProof"></span><span style="font-size:12pt" class="elementToProof ContentPasted1">Currently, I'm available from 8:30AM - 1:30PM on January 18 and January 19 for a meeting, so just let me know what time works for everyone.</span><br>
</div>
<div style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" class="elementToProof">
<br>
</div>
<div style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" class="elementToProof">
<span style="font-size:12pt" class="elementToProof"></span>
<div style="font-size:12pt" class="elementToProof ContentPasted0">Do you have any more information on the timeline for the tests? Particularly, is there a time frame that we're expecting mirrors at JLab that need to be tested?
<br>
</div>
<div style="font-size:12pt" class="elementToProof ContentPasted0">If there is some time constraint, please let us know so we can work the task into our schedule.<br>
</div>
<span style="font-size:12pt" class="elementToProof"></span></div>
<div style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" class="elementToProof">
<br>
</div>
<div style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" class="elementToProof">
Thanks!</div>
<div style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" class="elementToProof">
<br>
</div>
<div style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" class="elementToProof">
-Tyler<br>
</div>
<div style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" class="elementToProof">
<br>
</div>
<div style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" class="elementToProof">
<br>
</div>
<div style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" class="elementToProof">
<br>
</div>
<div style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" class="elementToProof">
<br>
</div>
<div id="appendonsend"></div>
<hr style="display:inline-block;width:98%" tabindex="-1">
<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Wenliang Li <wenliang.b.li@gmail.com><br>
<b>Sent:</b> Saturday, January 6, 2024 9:12 AM<br>
<b>To:</b> Anselm Vossen, Ph.D. <anselm.vossen@duke.edu>; Tyler Lemon <tlemon@jlab.org><br>
<b>Cc:</b> dsg-internal <dsg-internal@jlab.org>; Zhiwen Zhao <zwzhao@jlab.org>; Matthew McEneaney <matthew.mceneaney@duke.edu><br>
<b>Subject:</b> [EXTERNAL] Re: October 10, 2023 UV reflectivity test station meeting minutes</font>
<div> </div>
</div>
<div>
<p>Hi Tyler and all, </p>
<p>I completely agree with Anselm's suggestion. </p>
<p>I will be at JLab from the 18th -21st, if possible, we could have the coated samples double-checked by Tyler's setup during this time.</p>
<p>From the reflectivity measurement that was performed in December, the best of the coated samples at SBU was around 70-75% reflective at 300 nm. We are currently compiling a report documenting our findings which will be circulated to everyone shortly. We
are currently taking steps in upgrading our coating capability for further improvements.<br>
</p>
<p>Many thanks</p>
<p>Bill</p>
<div class="x_moz-cite-prefix">On 1/6/24 09:05, Anselm Vossen, Ph.D. wrote:<br>
</div>
<blockquote type="cite">
<pre>As I said, I am very interested to get my student involved (btw: We'll
also have a PD stationed at JLab starting in February, but I am not sure
if he will get involved, maybe it makes sense...)</pre>
</blockquote>
</div>
</body>
</html>